{
  "manageEntity": {
    "action": "Save",
    "entityId": "369647",
    "entityType": "Track",
    "nonce": "0xa39f0f431e7088b6605110be7a6d7c45a243b7acba9d8c35e0881a9548d76250",
    "signature": "0x16047ffc68d53e8c74b4b3b2f976a32a22ca2c577f565b9e8c4fb36456bb52bd03301ac04aba903ad80b5822861ffc321a198316143ec319f290ed426dba53de1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}