{
  "manageEntity": {
    "action": "Save",
    "entityId": "88037",
    "entityType": "Track",
    "nonce": "0xdb77b01337f0b1e6ab430fd33d39a5adf55f2b965ddf8737e8b76297810ae907",
    "signature": "0x6c15ec17e141af9eebfbe825c6e9d59fb9446d45dce798c45339bd35057bb96456adf52cf1a4d731dce304ddd02935eb3cbb5c9a7f32116ece84c5d509ed6b831b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}