{
  "manageEntity": {
    "action": "Save",
    "entityId": "1146005032",
    "entityType": "Track",
    "nonce": "0x7389eab17471d34b7dcd0896f6a3971a901686077375d8dc5ac253efedb189ad",
    "signature": "0xddec67b423d1a4ccfebab739351c0ac3adc38a7e8dff31b642952e8c66071d9e4dbb3fb1db0b9a0a217eb7e15651c5007219d64fe27506c894094faca9f328bb1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}