{
  "manageEntity": {
    "action": "Save",
    "entityId": "577209605",
    "entityType": "Track",
    "nonce": "0x146e406ff0bfd813e9f7a200608ba6d9fd46960141b0bcd10c47a2c99edfee54",
    "signature": "0x316907726e88ec33f3be798a09cdfd5b823085b2397017ef598aff506a03345d529f400ef039c79a2c701b8690a6617eb2c67258e2d541cae0ded1f42dc0bf901c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}