{
  "manageEntity": {
    "action": "Save",
    "entityId": "1788922721",
    "entityType": "Track",
    "nonce": "0xbc13e2935377a8f1b53f2baf69739ae58dc5a0b8e5cb7e79f214841051ac6811",
    "signature": "0x51666da3574ac7380244d31d4e92fb1001e330667be29c9948e4dd44d6e2d7527e0ce6cdce82e9a42242a37884b7464a7273e7060dc3a740e892f8e52277f8771c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}