{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "1897466029",
    "entityType": "Track",
    "nonce": "0x28cd61efc77c73a500f6c32fc73ffea888802788004e255b3e3d4969653b6caf",
    "signature": "0x7a844bd4fa5a54e807e423af8f2f1d40e49874a9650bcb6e98749b1eda1685591d5f8274effa5a5874b13d459ee58d2535e0eb8b4688ad4990e87129f53055641c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}