{
  "manageEntity": {
    "action": "Save",
    "entityId": "691319277",
    "entityType": "Track",
    "nonce": "0x33b1de3af3aacf6d5fe0793171b84e69c6cf8ef7c5b6ade12cb469f40a8aff02",
    "signature": "0xd69ea494556c86b0971799982109541c3c8b6e26e54b926d0cd21b343673b3d84589920393218e5349a7e38775cfc62ae92834a027f8e57951efa7b0980595f21b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}