{
  "manageEntity": {
    "action": "Save",
    "entityId": "1976011090",
    "entityType": "Track",
    "nonce": "0xde01a633edf931db3de56e06799f3313f616361993c72f7d4628d0cebb24fa51",
    "signature": "0xd94c3153144596e3ebe38ece039eb66b3781c7a467806b2fe1212e4c596c6f991ab122be4083396ae826abb14f62f365f1d17b6e862fb150936776cf0b6ea0541c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}