{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781007494",
    "entityType": "Track",
    "nonce": "0xaa75686e3a086f265293a5aa405aa809e7e46a5621ad5cc534ccaeea57fd1a48",
    "signature": "0x1ff256cfd131c2a7e04942da7ddb148680ca8cc7b8aa926813db406103983c0a47f0ffc88753d3a71494197b3757d25edcddb315d0d09fb4bc915317d299485b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}