{
  "manageEntity": {
    "action": "Save",
    "entityId": "243324866",
    "entityType": "Track",
    "nonce": "0x20c09b0a0bd1c2cead3627843c7001e5e64955b84f7ec1a2a745ee134fb17d57",
    "signature": "0x05c5f9e50aa2b289830a3af9fd6f69181ec57a76e25546744ff7af34cd2c4fc556918e816a8ceb41864cc2cf3561d2ffb26322f973881ba3000c2fc1cc817fdc1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}