{
  "manageEntity": {
    "action": "Save",
    "entityId": "2145839425",
    "entityType": "Track",
    "nonce": "0x24aa827757a3e2e0fc8b0ca75372ab7002b23f41edcf9bf1e4c99b5f7ecb3d91",
    "signature": "0x8831b1dc2cea23bc3589395713411f67dbca38992ee397abbbb297584a096472603f27381441cdabd144c0814e3ed7286636afcc53750e1fdfee24ceb979a7191b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}