{
  "manageEntity": {
    "action": "Save",
    "entityId": "22876365",
    "entityType": "Track",
    "nonce": "0x92563492a68e66f0d33ee2108064d53f377e11ee8acb643c44883854ad37457d",
    "signature": "0x66fa7403b69959f55ef857791b1e8e709b5c1969c72afb4d41260a3df019730b30091b8fd2ca825e0c2c5e8b26c6cc4d9694b2497d10d1af8e98d164cf22148c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}