{
  "manageEntity": {
    "action": "Save",
    "entityId": "906964475",
    "entityType": "Track",
    "nonce": "0x75fac223fa5bbf087eecc6c91acf99d95d6200f76850e393a082b133a1d00694",
    "signature": "0xf4ea3c3d2938b8e370364a506403a73e71318e6e79b3ceddf0f525fd3ce50e5a13ac5511e300f5f32d392a571c20dfd57794530440eff8ae4cb6bcef463ac36b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}