{
  "manageEntity": {
    "action": "Save",
    "entityId": "2120597642",
    "entityType": "Track",
    "nonce": "0xaeda68a02f4c3e1dcb32a72ea35c3f0a6e91911265b458c74495166dddcd942e",
    "signature": "0xfe93b8d6e5f733eac3858b1a2e2176f1272aad15c5873c031b79b8f63f27ab35434c0a03fb0b0a599569202ae0557e8244e32afb3e127757bca2c082859c3b7e1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}