{
  "manageEntity": {
    "action": "Save",
    "entityId": "1998377210",
    "entityType": "Track",
    "nonce": "0x82ca961c64f483c31c114c827919ec974c79d6c8dfeed528d7baa1eb58a5c741",
    "signature": "0xe12837f95bffc357f1af968acc3243a49f4bcb4968fdd5cd2d2ddf780b88115b690d4a401e98b5b59e7ee5d1975fdbee20afd6965644bab2041eebfcb94a38ed1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}