{
  "manageEntity": {
    "action": "Save",
    "entityId": "471846309",
    "entityType": "Track",
    "nonce": "0xb01ac414613f05790ebcda3845e34767152fab281e0355cd6c68eee1284f7d40",
    "signature": "0x420d2b1b27a612ec525fec8f5914b4a80f3d6fa41a1cb9c94fa3bf50c297a7c069f3f34d3363333362d11b4747b399200cc5a6c08b2634e918f837a28bd470ae1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}