{
  "manageEntity": {
    "action": "Save",
    "entityId": "1893558792",
    "entityType": "Track",
    "nonce": "0xf645c11a20585f7392e504b3afd8ff7ec4d9aac1204bc3d82be74dc32c087e6e",
    "signature": "0xddf22d85d2d5dd40ca15bad903a86f5c8a8a04315e1f5a80b99e8b6e7108dca07e52809d0ea0d6ff653d60a757816bec540f1aed5342b2b30f1175b0984630db1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}