{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047582",
    "entityType": "Track",
    "nonce": "0xf223fd33d1aff6ea85a1f885b727d1b2ada8a8e6ead29c1c95998e9a0663a94a",
    "signature": "0xe9b7494df3b72d0b100cc0cada16764c31b2350696dc5e1d043926d7ebf8409a7be1e76cae078159a554b43551ecd44567a152cb8aa6a642a39eeed7f47cf1dd1b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}