{
  "manageEntity": {
    "action": "Save",
    "entityId": "1204068258",
    "entityType": "Track",
    "nonce": "0x0d3ed4b8f000af6eb0a8663daaadcdf0f681d306f82ec86d974c724871246e1e",
    "signature": "0x0490ce52e31c0cd326eb3c4c2c70d7096573e347e30cc19170ea3b94a9619aa818c63fc1f0101d11d2566f25634120415b6bbd5604b8008066d1a35f5fa0f0eb1c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}