{
  "manageEntity": {
    "action": "Save",
    "entityId": "2049280718",
    "entityType": "Track",
    "nonce": "0xa43d6f4eff8579b36e33b3aea5ec6f9b561fb63084042ad2e0497f3d571c8e43",
    "signature": "0xb357be7a123948ae26747cb0cd5188efa42e63f09d07e2a17d9909c556de9d254d9d232a77af5df612ff162c974d07d15def3561afa7985cf7d479929abf041d1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}