{
  "manageEntity": {
    "action": "Save",
    "entityId": "1869166950",
    "entityType": "Track",
    "nonce": "0xcc9cd5dde541b36aee1635ff3e49b6bad478ef0ac20c8015ab953de61177d4bf",
    "signature": "0x796db36b3657f3155692e6b3cfc3c23baed7e6650d9b12e8d75404e4d6680a59498e6678496dc386d5f53a287d9d60a854e815fc5132b28837b44561dbda2cdf1b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}