{
  "manageEntity": {
    "action": "Save",
    "entityId": "1027549690",
    "entityType": "Track",
    "nonce": "0x944d2080df9b2062739241ceb70f2d303ac1f4d8d59ce32ce39e0f4073b92133",
    "signature": "0x367887fd2a33d06c15edb28da1b2d3259eaf1a2983b9f9579195ef368fa28acf2eb6180ec4404333b08ff10a35ded22167e27631681b1d9c700eae0e96cb07b01c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}