{
  "manageEntity": {
    "action": "Save",
    "entityId": "722860845",
    "entityType": "Track",
    "nonce": "0xd5f73f6446b936b77686b172a09e5d4a2db000a53120f805c71b8f72813f17a1",
    "signature": "0x6b88b0b246fdf80f25bad4d56acdb1177cf9d221b8349dcd7de5aaaeb135cb2318ea033ab38143e374e6d3f4716a98181e62b35b937fbbdac6e21a0975a60b1b1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}