{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124994285",
    "entityType": "Track",
    "nonce": "0x7e31562ee994385553c0b053ed6e2349e4131bebae4b191f257ed70f73cceda6",
    "signature": "0xb27d390e77457a5686e73df9ce0656a81c13fd5ae0e06d6216b101962c72161b42037a728a491a76f528edb6c76b2629d4acea6c0f3513c649425521268b5bab1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}