{
  "manageEntity": {
    "action": "Save",
    "entityId": "1535806587",
    "entityType": "Track",
    "nonce": "0xca23a2b1aead0ecef3798f31b95ee50132dc44fb32edc3fabb8d9a31faf1517c",
    "signature": "0xa67b66103b32b441964eb04dca7d6392b887e62cd62fd4f65afd48550eb00bd0399a0c2a663844484b02a33a777fdf7d0b48e855ab28616fab52282ab4b86f8d1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}