{
  "manageEntity": {
    "action": "Save",
    "entityId": "681021769",
    "entityType": "Track",
    "nonce": "0xf13d46797940a0f5ccb07587c39fd6509e44268e04304285c34e714cda15dba9",
    "signature": "0x6604e92fd3f2346dda12efb5d16c700397ef36096360eb66e71009091c5d2eae5ab2e7e7b6b531be491e4a0db3e6322680ec485be1c8fc2ad5d37a44d7ea01261c",
    "signer": "0xc00163EC4A1f48C70D0b676b7F5c071142de6C02",
    "userId": "227991193"
  }
}