{
  "manageEntity": {
    "action": "Save",
    "entityId": "366212943",
    "entityType": "Track",
    "nonce": "0x79808309968227bcafab10b6237144ef1df3b3ca898c3a0c06d8008b7788653d",
    "signature": "0xf234218932bd83e6b6fcf020fbd4b80f18de10fa218241e813e1f2e538af77f06c7d6e6ef3195095d8c3b592489ca9d8ae6d0493aaf1ce5b5a0cdea9c5fed2f51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}