{
  "manageEntity": {
    "action": "Save",
    "entityId": "68892",
    "entityType": "Track",
    "nonce": "0x133fb8e8cdbc90fe2f145629ef505c9a40b58f7d6c78b97e09aba3d477ff31a2",
    "signature": "0xb2cc30bd2da75671c593aa1738ba988b54b3d66fc4d1d0a9d13307d20525530a3d111ed67a01a6936fe19f5d3550678a10a26d5723814050e9fd8ae61b78dae41b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}