{
  "manageEntity": {
    "action": "Save",
    "entityId": "1987363266",
    "entityType": "Track",
    "nonce": "0x795e4bd443c752fc8069019d8e0834bedf1650a17194cc51f3e15dc87294658f",
    "signature": "0x2af69fcade6cf19d4f4ac385e0b8661f0921f5cacfcc0bd6ea97f0ed32c83b8f23398b8ca0ac8afc8a7a4ffa1ea4b91223762a11bdbca390c89587f1053d2ded1b",
    "signer": "0xa22176a11BF6703EFe39D488aA7cC06aa781C44A",
    "userId": "633924738"
  }
}