{
  "manageEntity": {
    "action": "Save",
    "entityId": "2141385280",
    "entityType": "Track",
    "nonce": "0x3a4a0abe24f535fc83353af287d56808d6efeb7fe606e8c8b4dd375c7968e6f3",
    "signature": "0x7f2fbe3dd4ffb2c09f10d2a16dd56058e0b524abfc367bafcbbd8c67f7fe5b2e7a0753be7c075b744737b4058ae4bac25d2e16ba4877e1d00928e1f121752c231c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}