{
  "manageEntity": {
    "action": "Save",
    "entityId": "548947448",
    "entityType": "Track",
    "nonce": "0xe18a8e8253afb745d41dc40a15617d377774a69789d0cf6706238cae877d93b3",
    "signature": "0x82e75995a63628b0b65a6896eb584526970b574f51821d076298c8e517368f31244df79226d1357dfb4d42a928e5d29c146ce922260f8ea4366d72db76b483fb1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}