{
  "manageEntity": {
    "action": "Save",
    "entityId": "625985084",
    "entityType": "Track",
    "nonce": "0x731d412fd0e6d44292b49def109b5612f5d7562ea6470d189cb3f18c9b786210",
    "signature": "0x6adc66ed8838a7abf517e6414b7e62e11c6d99fd12e40b2a01b51aa96e8db4832c1fa298cb72c9704c13a8417427ed4dcda2b34fc3f7f09077f0f8e03de89ada1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}