{
  "manageEntity": {
    "action": "Save",
    "entityId": "306956988",
    "entityType": "Track",
    "nonce": "0xfb9c59ac78d5737b6ddddbed8d0a29bf59569fc2917c737c6e114f6ddadf3737",
    "signature": "0x36b03c3240127e214301eeb910e3e769da840bd7be870df94d542c343b493e0b21954900ee05febfa8e7dd291015c7a9f0124a0431020775ba31a03a1703661f1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}