{
  "manageEntity": {
    "action": "Save",
    "entityId": "1084941",
    "entityType": "Track",
    "nonce": "0x279028b222f2470f14453e655d35c00a2f45f22c9fc3dfdaf806d0d85f1a2131",
    "signature": "0x79f2f0300f6a0f259bcb9e392199c197e6769520d3620a846913a8ff09a890790ac529565d2a38462bb24d8d80702e5fb06acf4862c31af065b5702fac1548d71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}