{
  "manageEntity": {
    "action": "Save",
    "entityId": "942941",
    "entityType": "Track",
    "nonce": "0xbd22721bad073eb2d1e24a54bd072ad745e4620e4566c5a5c25e456bdc5abca7",
    "signature": "0x6ba983feb708f94963e7ae6552025916d2bebec80a123724c2ca961bea9c986b1faf1fb67adfa7bdf57b504378ce7ee37f30a02cf645df9ce61056c010b94ca71b",
    "signer": "0x5f4a2839b22271B768Ced52D1Cf89eEefbbf657A",
    "userId": "773500132"
  }
}