{
  "manageEntity": {
    "action": "Save",
    "entityId": "940009349",
    "entityType": "Track",
    "nonce": "0x128fb3099275677b5c7d12b73fda4c531ad2d77e4a91538df74ebe8c7a9d70c8",
    "signature": "0x0d5cb9948f932ddc0610454fa8d5b100ab47e716dce10678d698f489d67a07fb51e55a4acbcbf0f498c99fa26067ca3849d14fbd27b9aad524dd2c66abd6033a1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}