{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262284565",
    "entityType": "Track",
    "nonce": "0xc69a5b9abb979e374caa493ce07f5c5e666914b125b156fb74bfd2293ee172e0",
    "signature": "0xf412931b3ee6454914b31ff0e077eb4fe4f02c7c1a01ecc17586fcdce9ce6c710fbb1d593ab732caf030b0a3379278374710f223b698cd9ca7a12afa0085fb7a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}