{
  "manageEntity": {
    "action": "Save",
    "entityId": "242170184",
    "entityType": "Track",
    "nonce": "0x7e1ec3c7887f292a16157c52563e51720825f76cdef270a514e5fcfdda8397c3",
    "signature": "0xd71cdd7bcb7e4a5b321b6e2542d46a39c010c7ec396d9f45171ccc093692e32c3d76a38f1b5f453ccb9288bb97e9c279d58e9f3e610bdc4d95950d3c6fbe36c31b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}