{
  "manageEntity": {
    "action": "Save",
    "entityId": "18523201",
    "entityType": "Track",
    "nonce": "0x23d8d2e69c29da2e548112273756f08c59443bf3143a8223d81cdd7e2aefaa3b",
    "signature": "0x8626ef9e037bf8a347e38381dd3815d1440a2801d082b0d88f51319939f886486f4038e01c428bbf294d785df6d513ffc2ab66ca42309cacd98f03b4481164eb1b",
    "signer": "0xB755CddA6da08Cbad290b9528CD0dC860f9f7dd5",
    "userId": "536791428"
  }
}