{
  "manageEntity": {
    "action": "Save",
    "entityId": "320222",
    "entityType": "Track",
    "nonce": "0xa63b5a7ee94ab156c841da32fafed138c4447222d1fc3dee0f00876c66fac151",
    "signature": "0x6c5cfbc4cd1385370fd1e528dd653b629da2f65e82d072738fc4dcb847ea8e3b4ac66f960057fc58fa6ccc5f83e29f7033c97d9a20ed79d4913643832c43e8ce1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}