{
  "manageEntity": {
    "action": "Save",
    "entityId": "1862482916",
    "entityType": "Track",
    "nonce": "1789853281504484133",
    "signature": "0x5110de947f0c188760a42227972d66e408ee3a5684fe1d425534073f063804c554364bc0a9e22ba505b1fcb7b45b885a5269aab2cff5c692bf5c299fda2a8ab31c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}