{
  "manageEntity": {
    "action": "Save",
    "entityId": "200262181",
    "entityType": "Track",
    "nonce": "0x1c004cafee6f0d5a962013981f5395f67b2fdf3c7af2cb45d424eac45e354617",
    "signature": "0xc83104236d966b591f8344a09c8173c2104f4a6584677141d15010161a84950132ff6fb750ff9657a2762f44379e16d134e10baec58b7883e2a0ea1230d544811b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}