{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247765801",
    "entityType": "Track",
    "nonce": "0xbee44225e67a06b67cc2c1de021e1780990bc19354ef6f00a4565cd3544d6964",
    "signature": "0xb7c39b0cbcda0dfd33873fcb5308066f43f130200f872bcef7eb6f6ac9a5683446591a88dd6a761b36fa6076c464571cc2e5ed59af326806497a0585b1b4d9801c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}