{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775108013",
    "entityType": "Track",
    "nonce": "0xd95d0ea38c8bbdcfea74aa6a4994893be93c7a1f677541cded272d6f003a1a92",
    "signature": "0x8267da192357153ce4fdb356361f4751164df36875dbab0bc466819f45ce81ef577edf080cf020b76276404b5ada598f280ef70d242637dd8ed3dd11329724751c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}