{
  "manageEntity": {
    "action": "Save",
    "entityId": "1133211593",
    "entityType": "Track",
    "nonce": "0xcb61f359fd4a5414db77ea5d667075fd48c0a98fc45a27c202db0563ae1dbf8f",
    "signature": "0x190684e7c1e5598eadea62ccaf9b9dda99792fc30fca2b7eb428b46f76d8373049d7bae5eb36b8f830c408b2e791f56237e06b1a3b0357b2cc03681b63d4d72c1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}