{
  "manageEntity": {
    "action": "Save",
    "entityId": "493081",
    "entityType": "Track",
    "nonce": "0xb257998379ef6dfcce2279a3356202e9970e5f0ddae49008f68571d02f62f631",
    "signature": "0x601d39a3c56a4eda3fa1a99ac80f6b1cc3a2711e6e061dc92a0e04e204addddc3c2bfa2c6b40456d2882de48c20f423674897283e8028fe049fef8b0a72aa04e1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}