{
  "manageEntity": {
    "action": "Save",
    "entityId": "172031503",
    "entityType": "Track",
    "nonce": "0x4836f03e33b99c57fcf6dbfaea901d9b2a0b3a45174358881964f72bc13961e9",
    "signature": "0x4576e8c158c07bb5dd19962723183396e0c284e68be9e66a0be90d2567e3a2a356f5739f186f2c9ae9c618f494d456d16c9f75a7c199739649f7cc56b912fc361c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}