{
  "manageEntity": {
    "action": "Save",
    "entityId": "691215222",
    "entityType": "Track",
    "nonce": "0x29af6ab28a8c149a929ae8e59b058b00f378a2666c44a8d4cca34b305a300beb",
    "signature": "0x74dba4fbf5cf831ef6652a372797cdb5b755a514400f88576770f0d50f2b37cf17f936f7ea9a3ade0105c2c47998c6c1d53bf100eb52100e8a0711066aeda67d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}