{
  "manageEntity": {
    "action": "Save",
    "entityId": "211459",
    "entityType": "Track",
    "nonce": "0x0ae616b5c3fa914201374b48dd859161147b36c2e5e47dd79af9b0a66ab42ecb",
    "signature": "0xda6c43d75099b121a0717fd36e3ab27a7dc043e3721ecda393ab1ab1277186be4e050163ba7462846018dd9f7a71c3b1478d943e1698915afe20e89292b8bdd61c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}