{
  "manageEntity": {
    "action": "Save",
    "entityId": "723248793",
    "entityType": "Track",
    "nonce": "0x36b1dec91391bf04ffda8df7fa410ef79b48d3ff2cfe6907ec4e58223ea30302",
    "signature": "0x4a8815ffd19022e10021f82327e492d69076626d88b51f4abc0b13d4f8cab7f025ad6105f4ca3b89e3179e8702682a79b286ab26ee7c5a9934f5408f3f1863491b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}