{
  "manageEntity": {
    "action": "Save",
    "entityId": "1061847",
    "entityType": "Track",
    "nonce": "0x429da1b7669e3043ae05e063806af1b0e1ffdd56efff1070b633014d19131cdb",
    "signature": "0x2fb335e2e0041b19097d261a8de0ed1e0ec077f8ddeb62a2925e07f4eda87c3532a417ea87188af43a8688903ba533929f0b7aff977d24d939e4962a6a32e8641c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}