{
  "manageEntity": {
    "action": "Save",
    "entityId": "752131892",
    "entityType": "Track",
    "nonce": "0x23815457c8db923362cbc1e5a20a0c0723feea83536ebf9a849fef10f50b7d8e",
    "signature": "0xe943dad1c062bdccf1fa57a95d430b102ad0542de734defc8a48b5d46f0a2bb54e64418b15ba33f9fa840fd9ca7acba741cda2828f730c6955732876fa3535d91b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}