{
  "manageEntity": {
    "action": "Save",
    "entityId": "1194979467",
    "entityType": "Track",
    "nonce": "0x5cc4d8425f0083987af955035baa943d37a8ea511c6e88ec82545254a7c5bbf6",
    "signature": "0x071a4e0a2c3c1c00e8375c05a682a773ef2a3b1185d20a91c9bc964ce76221f77394953175313ca897433110d2f0dd803fba1a4e099fdc80e4b5f1ca3be57d8c1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}