{
  "manageEntity": {
    "action": "Save",
    "entityId": "169855508",
    "entityType": "Track",
    "nonce": "0x6dac069057e61f4da001ba02f51e05e700141a2984b87d99de9a81cd1e6ab5bf",
    "signature": "0xa809c2da5a5e3fa267538ded23acc68c2117a95ba4019fa2488b4bac6f28c0114423fef010cc2f8eac0c9230f756dc8ec8fd5bf254c104df32d0ba42c12fb0a81c",
    "signer": "0x484d8957F3f2AAC8A75b6c9769692fB7Bf806850",
    "userId": "413536646"
  }
}