{
  "manageEntity": {
    "action": "Save",
    "entityId": "994848",
    "entityType": "Track",
    "nonce": "0x2ca2bd0ad72fa6edcc4abcf4aad7a07129acca6183667e46ea359f2dfd1213b2",
    "signature": "0xec9e54393c575a9210de8be09f25b3ce98af4fc48a9b1b655578fa605c77a1bd02450f5271f8c77ddb894cfb851c7996eebba46d5f303eb73c730734d342e3101c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}