{
  "manageEntity": {
    "action": "Save",
    "entityId": "297165878",
    "entityType": "Track",
    "nonce": "0x2db30ff80cd768d58e71e01bbd0ed05f3e18c7e8e2480a47f594604c03626ff7",
    "signature": "0xe03c6b1326624fb858a6edd3bc56f3e4e144466ee932b37d7cfbbe7db7f2ea1049ce9731b832efeb4de7bd5b206ff285a990f0f5f55f9441ec36a643442de2af1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}