{
  "manageEntity": {
    "action": "Save",
    "entityId": "676251282",
    "entityType": "Track",
    "nonce": "1789654077373390774",
    "signature": "0xc6f492bb85c1506c9ac3ca70c85839ff7bdd311eace20d7456c5ecae28172c4c586df723b7b643a0c2b1223ad05baabdc671638c15cae4dba7f3635f2d42256d1b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}