{
  "manageEntity": {
    "action": "Save",
    "entityId": "201546",
    "entityType": "Track",
    "nonce": "0x2fa7d4c444acb7e641e7593fa0059b901d3886b7d4b0cf430f221d8b7c9ede59",
    "signature": "0xd9119f8116841f92259cc443bd7696e2cae1ebb699f5153055927e7384646e2271b7f630c78b5e3679b87d0cda3d483997aed130b084bb041c5241b12ad506cf1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}