{
  "manageEntity": {
    "action": "Save",
    "entityId": "969436282",
    "entityType": "Track",
    "nonce": "0x19a54fd9c482caa99fbc21c0aace0e1c51e31a37cc9e5f18ce96897df47a5a36",
    "signature": "0xf70b3a7f727cfa6702a993b88bedadb51ec01b3eb1e1607c8ac3670116f7873e0c74114ec422e555773f1c2f6d00d5c28b3439820a55916d83496a81df9909851c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}