{
  "manageEntity": {
    "action": "Save",
    "entityId": "1490652260",
    "entityType": "Track",
    "nonce": "0x6debb63d4a1bef309591d0e81bd95e7bb6e0d1c72d637ea86b579c60e4c3d75f",
    "signature": "0xeb2e5eeaf1b430b1262f723da07be2aa40e3c86c4d6a2085643927fa3021fa321f7afc8e393a13bf5c27795835d326e70c664b7d03ef833bdd12369438960f8c1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}