{
  "manageEntity": {
    "action": "Save",
    "entityId": "160322123",
    "entityType": "Track",
    "nonce": "0x75ff5dff7f2fa0ebf263a9b289ba96d65c93052fbae8f3083d199ab3239716df",
    "signature": "0x7db290b85c5da196352fceea6f07308c62657c9de817cb12d33a08d500a358d862bb1c5e85a6c8de6ba5512089825e63a128bd054c18a78c790d71bc7e6f2a2b1b",
    "signer": "0xbAdBF88a35ef36005fDD5ab7feC2d1561D200E55",
    "userId": "828403040"
  }
}