{
  "manageEntity": {
    "action": "Save",
    "entityId": "1365397489",
    "entityType": "Track",
    "nonce": "0x74b93c5ae0cd7a9cbeef88550113e8fef805f1bb7cf32cfdade24ab46f668b7b",
    "signature": "0xe284c92b951895c90cc294a444f2738a3ab9b2d97522894e2b9a3ac21d10426e414e28991faece8ba15091b411cbae2f6f4b32bba9b84f7f14e472b2793093901c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}