{
  "manageEntity": {
    "action": "Save",
    "entityId": "625534873",
    "entityType": "Track",
    "nonce": "0x4a9d841f0769907680a12d918fa49362b52e5e2b8291755732531496633067a7",
    "signature": "0xcff3587e2100512c53f00f238afb9f5ddc2042ca796ab63dd54a65de348cb557575732d5394ddfeca8234e5c9b46fac45e2b7697a3ba5b997e8f825483bdd5411b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}