{
  "manageEntity": {
    "action": "Save",
    "entityId": "2136601441",
    "entityType": "Track",
    "nonce": "0x69fe792ebe46e452baeabcd1c3d7b9197aacecc174c9480b1768626944908738",
    "signature": "0xae69dba56e8ca125c4cff3eea8a6cc79bd376523700303f401a394eb8e97c81070f981abd91d8f965eac5018209dd91fe92a784d150245918efa3558fc0ef6581b",
    "signer": "0x8f514cad8C78753442772BbdDbbE6d8313e418Ad",
    "userId": "121215"
  }
}