{
  "manageEntity": {
    "action": "Save",
    "entityId": "43964899",
    "entityType": "Track",
    "nonce": "0x28173e5682d696ed2f03dc74e4f770257a0101590be22b3c52628f31281d9792",
    "signature": "0xaa82d434c4806fdaaac23b013958c3d66933a435a1d8290ada5af490e73cfc0e11fd9c53ee9136be933874b0237065dde9acccced566936a9e0a50a1c50851651c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}