{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525568838",
    "entityType": "Track",
    "nonce": "0xea872f65388b49b18c9161c6d8d7ac0c62e299c5f0421f53a52f6e76bf2f2d91",
    "signature": "0x917ec7e6b8fbc6baefe02a846f609ef96cea39392b2f9e19e9e924c5aeeeba473a73ed6ef285dce533c65ff799ae89318502c7d22cd2a4c7d0cc1531d104e4231c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}