{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073901",
    "entityType": "Track",
    "nonce": "0x0c0d2b7ed2b2ebabb4159f79734fcb668b6734c7a1c0f4bb71bd2b7b8a5dfd32",
    "signature": "0x47ce31fe883aee3a2569bbd9195c6f52bb764a29fbea5a2aa480220cace08bc7111a28459fd116ad1f47fdc21ffc6a6ab1d5a518ced613c18e989b3a13817ffc1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}