{
  "manageEntity": {
    "action": "Save",
    "entityId": "801591713",
    "entityType": "Track",
    "nonce": "0x872a431c57b517677f8355317554128df55b62cc87a7fb3d358f2622439b9069",
    "signature": "0x2ad92f9e315fad74352c5ffaf737407eb67e7aacdb2aefd1d43e9c66da33d2780cf159593018f79a610f4eb94e43cc526d5c4e5c5ebed7fa4fb725f86d6f31171b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}