{
  "manageEntity": {
    "action": "Save",
    "entityId": "2094512474",
    "entityType": "Track",
    "nonce": "0xf15f5c30877369d565e638ae9fa892558e68961d8ccf0137ccdd4df44a9b1e25",
    "signature": "0x43cfd086bca80c487ce8554e0b37063dcdc78c500b77e32cc36d411478880ebb3f3faaceb1543818f363b8e2980c483a2b1c629c70a3e92cc6b1090ae069123e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}