{
  "manageEntity": {
    "action": "Save",
    "entityId": "1194380944",
    "entityType": "Track",
    "nonce": "0xf37a567e6545fece37eb3f8bfa8dc6ed333181f5a39d3842408d78a469b71fbb",
    "signature": "0x5515cd6597449e510d85e516f0b1bc766441844339e17093603284d7a49e3288356d84ae4e747194ce772739244bbd2ca21a0f4fc75852740f4713bc50f78ff71c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}