{
  "manageEntity": {
    "action": "Save",
    "entityId": "1030641305",
    "entityType": "Track",
    "nonce": "0x1114843a8f91d6b712df467fdabe87f0fa4fcd67eaeefb0d8c386b180421c791",
    "signature": "0xe5766c2c8566fd1528da9874bfd38949541518c34e40f740648f14d4541cb89e43b5409809b45b0487f6f35159a6370fec8b2779024cd23065e4dc76c892f19f1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}