{
  "manageEntity": {
    "action": "Save",
    "entityId": "393173036",
    "entityType": "Track",
    "nonce": "0xac0617a2cf8e6098a220c42ab207ac708950c58db3d5cb2695d813acf54512b3",
    "signature": "0x46dd1c951367291cbf75dc2c8dc4c1e928795b54fb7c1b63c154bfbb672525425edd54b6d24c24b9799049f09f5dd2d5c85e6cfde0ddd381c21127aa719b0efa1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}