{
  "manageEntity": {
    "action": "Save",
    "entityId": "271813796",
    "entityType": "Track",
    "nonce": "0x9bc56c72364a65a69831e60bcf0fc8e90609a6814c210f813bb3a9807c83d706",
    "signature": "0xb8e1f33cafd49928fa8fe66c52d5d2468316564d1ea4e21a7eaa563cfcee1ba8018059ce989b14a96a61fb3e24cf65113dbd3819cbc2b4c11027c0cea75f67631b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}