{
  "manageEntity": {
    "action": "Save",
    "entityId": "440866969",
    "entityType": "Track",
    "nonce": "0x02a9ec829ac23925a0973a558b53842fa293524afca7dc374a05116822cb99f1",
    "signature": "0xa6609d5fe5952277fbe2b77b2dc9e1fc96efc16cc569ab058b8eab52a1141a847baedd392d3f68e711daf5a99be9ccc6bb11ba224332b8277a5a3a141f079acb1c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}